Freezing of ridges and water networks preserves the Gamburtsev Subglacial Mountains for millions of years ...
Once an ice sheet grows beyond a critical thickness, the basal thermal regime favors melting and development of subglacial water networks. Subglacial water is necessary for bedrock erosion, but the exact mechanisms that lead to preservation of subglacial topography are unclear. Here we resolve the f...
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ftdatacite:10.7916/d8xw4j5r 2024-10-13T14:02:34+00:00 Freezing of ridges and water networks preserves the Gamburtsev Subglacial Mountains for millions of years ... Creyts, Timothy T. Ferraccioli, Fausto Bell, Robin E. Wolovick, Michael Joseph Corr, Hugh Rose, Kathryn C. Frearson, Nicholas P. Damaske, Detlef Jordan, Tom Braaten, David Finn, Carol 2014 https://dx.doi.org/10.7916/d8xw4j5r https://academiccommons.columbia.edu/doi/10.7916/D8XW4J5R unknown Columbia University https://dx.doi.org/10.1002/2014gl061491 Geomorphology Physical geography Text article-journal Articles ScholarlyArticle 2014 ftdatacite https://doi.org/10.7916/d8xw4j5r10.1002/2014gl061491 2024-10-01T11:37:24Z Once an ice sheet grows beyond a critical thickness, the basal thermal regime favors melting and development of subglacial water networks. Subglacial water is necessary for bedrock erosion, but the exact mechanisms that lead to preservation of subglacial topography are unclear. Here we resolve the freezing mechanisms that lead to long-term, high-altitude preservation across the Gamburtsev Subglacial Mountains in East Antarctica. Analyses of a comprehensive geophysical data set reveal a large-scale water network along valley floors. The ice sheet often drives subglacial water up steep topography where it freezes along high ridges beneath thinner ice. Statistical tests of hypsometry show the Gamburtsevs resemble younger midlatitude mountains, indicating exceptional preservation. We conclude that the Gamburtsevs have been shielded from erosion since the latest Eocene (∼34 Ma). These freezing mechanisms likely account for the spatial and temporal patterns of erosion and preservation seen in other glaciated ... Article in Journal/Newspaper Antarc* Antarctica East Antarctica Ice Sheet DataCite East Antarctica Gamburtsev Subglacial Mountains ENVELOPE(76.000,76.000,-80.500,-80.500) |
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topic |
Geomorphology Physical geography |
spellingShingle |
Geomorphology Physical geography Creyts, Timothy T. Ferraccioli, Fausto Bell, Robin E. Wolovick, Michael Joseph Corr, Hugh Rose, Kathryn C. Frearson, Nicholas P. Damaske, Detlef Jordan, Tom Braaten, David Finn, Carol Freezing of ridges and water networks preserves the Gamburtsev Subglacial Mountains for millions of years ... |
topic_facet |
Geomorphology Physical geography |
description |
Once an ice sheet grows beyond a critical thickness, the basal thermal regime favors melting and development of subglacial water networks. Subglacial water is necessary for bedrock erosion, but the exact mechanisms that lead to preservation of subglacial topography are unclear. Here we resolve the freezing mechanisms that lead to long-term, high-altitude preservation across the Gamburtsev Subglacial Mountains in East Antarctica. Analyses of a comprehensive geophysical data set reveal a large-scale water network along valley floors. The ice sheet often drives subglacial water up steep topography where it freezes along high ridges beneath thinner ice. Statistical tests of hypsometry show the Gamburtsevs resemble younger midlatitude mountains, indicating exceptional preservation. We conclude that the Gamburtsevs have been shielded from erosion since the latest Eocene (∼34 Ma). These freezing mechanisms likely account for the spatial and temporal patterns of erosion and preservation seen in other glaciated ... |
format |
Article in Journal/Newspaper |
author |
Creyts, Timothy T. Ferraccioli, Fausto Bell, Robin E. Wolovick, Michael Joseph Corr, Hugh Rose, Kathryn C. Frearson, Nicholas P. Damaske, Detlef Jordan, Tom Braaten, David Finn, Carol |
author_facet |
Creyts, Timothy T. Ferraccioli, Fausto Bell, Robin E. Wolovick, Michael Joseph Corr, Hugh Rose, Kathryn C. Frearson, Nicholas P. Damaske, Detlef Jordan, Tom Braaten, David Finn, Carol |
author_sort |
Creyts, Timothy T. |
title |
Freezing of ridges and water networks preserves the Gamburtsev Subglacial Mountains for millions of years ... |
title_short |
Freezing of ridges and water networks preserves the Gamburtsev Subglacial Mountains for millions of years ... |
title_full |
Freezing of ridges and water networks preserves the Gamburtsev Subglacial Mountains for millions of years ... |
title_fullStr |
Freezing of ridges and water networks preserves the Gamburtsev Subglacial Mountains for millions of years ... |
title_full_unstemmed |
Freezing of ridges and water networks preserves the Gamburtsev Subglacial Mountains for millions of years ... |
title_sort |
freezing of ridges and water networks preserves the gamburtsev subglacial mountains for millions of years ... |
publisher |
Columbia University |
publishDate |
2014 |
url |
https://dx.doi.org/10.7916/d8xw4j5r https://academiccommons.columbia.edu/doi/10.7916/D8XW4J5R |
long_lat |
ENVELOPE(76.000,76.000,-80.500,-80.500) |
geographic |
East Antarctica Gamburtsev Subglacial Mountains |
geographic_facet |
East Antarctica Gamburtsev Subglacial Mountains |
genre |
Antarc* Antarctica East Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctica East Antarctica Ice Sheet |
op_relation |
https://dx.doi.org/10.1002/2014gl061491 |
op_doi |
https://doi.org/10.7916/d8xw4j5r10.1002/2014gl061491 |
_version_ |
1812818279501135872 |